If it mentions the word "statistics", many people probably think of the number of notes to collect information, and many people probably think of the hassle of complicated calculations on the figures.
If you mention the word "statistics" Many people think of the numbers from the recorded data is being collected. Many people think of the complexity of calculating the numbers.
If you mention the word "statistics." many people still think of numbers from a note collect ข้อมูลไว้. Many people would think of the complexity in calculation of numbers.